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Smith, A,Atkins, RW,Bradbury, S,Celik, O,Chow, YCK,Cogan, P,Dowdall, C,Fegan, SJ,Fortin, P,Gall, D,Gillanders, GH,Grube, J,Gutierrez, KJ,Hall, TA,Hanna, D,Holder, J,Horan, D,Hughes, SB,Humensky, TB,Jung, I,Kaaret, P,Kenny, G,Kertzman, M,Kieda, DB,Konopelko, A,Krawczynski, H,Krennrich, F,Lang, MJ,Le Bohec, S,Maier, G,Millis, J,Moriarty, P,Ong, RA,Perkins, JS,Ragan, K,Sembroski, GH,Toner, JA,Valcarcel, L,Vassiliev, VV,Wagner, RG,Wakely, SP,Weekes, TC,White, RJ,Williams, DA
Astrophysics And Space Science
Whipple telescope observations of LS I+61 303: 2004-2006
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X-ray binary stars gamma-ray sources Cherenkov detectors X-RAY LS I+61-DEGREES-303 +61-DEGREES-303 SPECTRUM
In this paper we present the results of the past two years observations on the galactic microquasar LS I +61 303 with the Whipple 10 m gamma-ray telescope. The recent MAGIC detection of the source between 200 GeV and 4 TeV suggests that the source is periodic with very high energy (VHE) gamma-ray emission linked to its orbital cycle. The entire 50-hour data set obtained with Whipple from 2004 to 2006 was analyzed with no reliable detection resulting. The upper limits obtained in the 2005-2006 season covered several of the same epochs as the MAGIC Telescope detections, albeit with lower sensitivity. Upper limits are placed on emission during the orbital phases of 0 -> 0.1 and 0.8 -> 1, phases which are not included in the MAGIC data set.
DOI 10.1007/s10509-007-9473-0
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